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Code Editor : draft-legg-ldap-admin-xx.txt

INTERNET-DRAFT                                                   S. Legg
draft-legg-ldap-admin-02.txt                         Adacel Technologies
Intended Category: Standards Track                         June 16, 2004

Lightweight Directory Access Protocol (LDAP):
                     Directory Administrative Model

Status of this Memo

This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress".

The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.

Distribution of this document is unlimited.  Comments should be sent
   to the author.

This Internet-Draft expires on 16 December 2004.

Abstract

This document adapts the X.500 directory administrative model for use
   by the Lightweight Directory Access Protocol.  The administrative
   model partitions the Directory Information Tree for various aspects
   of directory data administration, e.g., subschema, access control and
   collective attributes.  The generic framework that applies to every
   aspect of administration is described in this document.  The
   definitions that apply for a specific aspect of administration, e.g.,
   access control administration, are described in other documents.

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Table of Contents

1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Conventions. . . . . . . . . . . . . . . . . . . . . . . . . .  2
   3.  Administrative Areas . . . . . . . . . . . . . . . . . . . . .  2
   4.  Autonomous Administrative Areas. . . . . . . . . . . . . . . .  3
   5.  Specific Administrative Areas. . . . . . . . . . . . . . . . .  3
   6.  Inner Administrative Areas . . . . . . . . . . . . . . . . . .  4
   7.  Administrative Entries . . . . . . . . . . . . . . . . . . . .  4
   8.  Security Considerations. . . . . . . . . . . . . . . . . . . .  5
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  5
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . .  5
       10.1.  Normative References. . . . . . . . . . . . . . . . . .  5
       10.2.  Informative References. . . . . . . . . . . . . . . . .  5
   11. Author's Address . . . . . . . . . . . . . . . . . . . . . . .  6
   Full Copyright Statement . . . . . . . . . . . . . . . . . . . . .  6

1.  Introduction

This document adapts the X.500 directory administrative model [X501]
   for use by the Lightweight Directory Access Protocol (LDAP) [LDAP].
   The administrative model partitions the Directory Information Tree
   (DIT) for various aspects of directory data administration, e.g.,
   subschema, access control and collective attributes.  This document
   provides the definitions for the generic parts of the administrative
   model that apply to every aspect of directory data administration.

Sections 3 to 7, in conjunction with [SUBENTRY], describe the means
   by which administrative authority is aportioned and exercised in the
   DIT.

Aspects of administration that conform to the administrative model
   described in this document are detailed elsewhere, e.g., access
   control administration is described in [ACA] and collective attribute
   administration is described in [COLLECT].

This document is derived from, and duplicates substantial portions
   of, Sections 4 and 8 of X.501 [X501].

2.  Conventions

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and  "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, RFC 2119
   [RFC2119].

3.  Administrative Areas

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An administrative area is a subtree of the DIT considered from the
   perspective of administration.  The root entry of the subtree is an
   administrative point.  An administrative point is represented by an
   entry holding an administrativeRole attribute [SUBENTRY].  The values
   of this attribute identify the kind of administrative point.

4.  Autonomous Administrative Areas

The DIT may be partitioned into one or more non-overlapping subtrees
   termed autonomous administrative areas.  It is expected that the
   entries in an autonomous administrative area are all administered by
   the same administrative authority.

An administrative authority may be responsible for several autonomous
   administrative areas in separated parts of the DIT but it SHOULD NOT
   arbitrarily partition the collection of entries under its control
   into autonomous administrative areas (thus creating adjacent
   autonomous areas administered by the same authority).

The root entry of an autonomous administrative area's subtree is
   called an autonomous administrative point.  An autonomous
   administrative area extends from its autonomous administrative point
   downwards until another autonomous administrative point is
   encountered, at which point another autonomous administrative area
   begins.

5.  Specific Administrative Areas

Entries in an administrative area may be considered in terms of a
   specific administrative function.  When viewed in this context, an
   administrative area is termed a specific administrative area.

Examples of specific administrative areas are subschema specific
   administrative areas, access control specific areas and collective
   attribute specific areas.

An autonomous administrative area may be considered as implicitly
   defining a single specific administrative area for each specific
   aspect of administration.  In this case, there is a precise
   correspondence between each such specific administrative area and the
   autonomous administrative area.

Alternatively, for each specific aspect of administration, the
   autonomous administrative area may be partitioned into
   non-overlapping specific administrative areas.

If so partitioned for a particular aspect of administration, each
   entry of the autonomous administrative area is contained in one and

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only one specific administrative area for that aspect, i.e., specific
   administrative areas do not overlap.

The root entry of a specific administrative area's subtree is called
   a specific administrative point.  A specific administrative area
   extends from its specific administrative point downwards until
   another specific administrative point of the same administrative
   aspect is encountered, at which point another specific administrative
   area begins.  Specific administrative areas are always bounded by the
   autonomous administrative area they partition.

Where an autonomous administrative area is not partitioned for a
   specific aspect of administration, the specific administrative area
   for that aspect coincides with the autonomous administrative area.
   In this case, the autonomous administrative point is also the
   specific administrative point for this aspect of administration.  A
   particular administrative point may be the root of an autonomous
   administrative area and may be the root of one or more specific
   administrative areas for different aspects of administration.

It is not necessary for an administrative point to represent each
   specific aspect of administrative authority.  For example, there
   might be an administrative point, subordinate to the root of the
   autonomous administrative area, which is used for access control
   purposes only.

6.  Inner Administrative Areas

For some aspects of administration, e.g., access control or
   collective attributes, inner administrative areas may be defined
   within the specific administrative areas, to allow a limited form of
   delegation, or for administrative or operational convenience.

An inner administrative area may be nested within another inner
   administrative area.  The rules for nested inner areas are defined as
   part of the definition of the specific administrative aspect for
   which they are allowed.

The root entry of an inner administrative area's subtree is called an
   inner administrative point.  An inner administrative area (within a
   specific administrative area) extends from its inner administrative
   point downwards until a specific administrative point of the same
   administrative aspect is encountered.  An inner administrative area
   is bounded by the specific administrative area within which it is
   defined.

7.  Administrative Entries

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An entry located at an administrative point is an administrative
   entry.  Administrative entries MAY have subentries [SUBENTRY] as
   immediate subordinates.  The administrative entry and its associated
   subentries are used to control the entries encompassed by the
   associated administrative area.  Where inner administrative areas are
   used, the scopes of these areas may overlap.  Therefore, for each
   specific aspect of administrative authority, a definition is required
   of the method of combination of administrative information when it is
   possible for entries to be included in more than one subtree or
   subtree refinement associated with an inner area defined for that
   aspect.

8.  Security Considerations

This document defines a generic framework for employing policy of
   various kinds, e.g., access controls, to entries in the DIT.  Such
   policy can only be correctly enforced at a directory server holding a
   replica of a portion of the DIT if the administrative entries for
   administrative areas that overlap the portion of the DIT being
   replicated, and the subentries of those administrative entries
   relevant to any aspect of policy that is required to be enforced at
   the replica, are included in the replicated information.

Administrative entries and subentries SHOULD be protected from
   unauthorized examination or changes by appropriate access controls.

9.  Acknowledgements

This document is derived from, and duplicates substantial portions
   of, Sections 4 and 8 of X.501 [X501].

10.  References

10.1.  Normative References

[RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

[LDAP]     Hodges, J. and R. Morgan, "Lightweight Directory Access
              Protocol (v3): Technical Specification", RFC 3377,
              September 2002.

[SUBENTRY] Zeilenga, K. and S. Legg, "Subentries in the Lightweight
              Directory Access Protocol (LDAP)", RFC 3672, December
              2003.

10.2.  Informative References

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[COLLECT]  Zeilenga, K., "Collective Attributes in the Lightweight
              Directory Access Protocol (LDAP)", RFC 3671, December
              2003.

[ACA]      Legg, S., "Lightweight Directory Access Protocol (LDAP):
              Access Control Administration",
              draft-legg-ldap-acm-admin-xx.txt, a work in progress, June
              2004.

[X501]     ITU-T Recommendation X.501 (02/01) | ISO/IEC 9594-2:2001,
              Information technology - Open Systems Interconnection -
              The Directory: Models

11.  Author's Address

Steven Legg
   Adacel Technologies Ltd.
   250 Bay Street
   Brighton, Victoria 3186
   AUSTRALIA

Phone: +61 3 8530 7710
     Fax: +61 3 8530 7888
   EMail: steven.legg@adacel.com.au

Full Copyright Statement

Copyright (C) The Internet Society (2004).  This document is subject
   to the rights, licenses and restrictions contained in BCP 78, and
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This document and the information contained herein are provided on an
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   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be

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found in BCP 78 and BCP 79.

Copies of IPR disclosures made to the IETF Secretariat and any
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The IETF invites any interested party to bring to its attention any
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Changes in Draft 00

This document reproduces Section 4 from
   draft-legg-ldap-acm-admin-00.txt as a standalone document.  All
   changes made are purely editorial.  No technical changes have been
   introduced.

Changes in Draft 01

RFC 3377 replaces RFC 2251 as the reference for LDAP.

Changes in Draft 02

The document has been reformatted in line with current practice.

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Code Editor : draft-legg-ldap-admin-xx.txt